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  <title>Gets class constants</title>
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  <div id="layout-content"><div id="reflectionclass.getreflectionconstants" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ReflectionClass::getReflectionConstants</h1>
  <p class="verinfo">(PHP 7 &gt;= 7.1.0, PHP 8)</p><p class="refpurpose"><span class="refname">ReflectionClass::getReflectionConstants</span> &mdash; <span class="dc-title">Gets class constants</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-reflectionclass.getreflectionconstants-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>ReflectionClass::getReflectionConstants</strong></span>(<span class="methodparam"><span class="type">?</span><span class="type"><span class="type">int</span><span class="type"></span></span> <code class="parameter">$filter</code><span class="initializer"> = <strong><code>null</code></strong></span></span>): <span class="type">array</span></div>

  <p class="para rdfs-comment">
   Retrieves reflected constants.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-reflectionclass.getreflectionconstants-parameters">
  <h3 class="title">参数</h3>
  <dl>
   
    <dt>
<code class="parameter">filter</code></dt>

    <dd>

     <p class="para">
      The optional filter, for filtering desired constant visibilities. It&#039;s configured using
      the <a href="class.reflectionclassconstant.html#reflectionclassconstant.constants.modifiers" class="link">ReflectionClassConstant constants</a>,
      and defaults to all constant visibilities.
     </p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-reflectionclass.getreflectionconstants-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   An array of <span class="classname"><a href="class.reflectionclassconstant.html" class="classname">ReflectionClassConstant</a></span> objects.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-reflectionclass.getreflectionconstants-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>8.0.0</td>
      <td>
       <code class="parameter">filter</code> has been added.
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 examples" id="refsect1-reflectionclass.getreflectionconstants-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="reflectionclass.getreflectionconstants.example">
   <p><strong>示例 #1 Basic <span class="function"><strong>ReflectionClass::getReflectionConstants()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">class&nbsp;</span><span style="color: #0000BB">Foo&nbsp;</span><span style="color: #007700">{<br />&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;&nbsp;&nbsp;&nbsp;const&nbsp;</span><span style="color: #0000BB">FOO&nbsp;&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;protected&nbsp;const&nbsp;</span><span style="color: #0000BB">BAR&nbsp;&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">2</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;&nbsp;&nbsp;const&nbsp;</span><span style="color: #0000BB">BAZ&nbsp;&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">3</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">$foo&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">Foo</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$reflect&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">ReflectionClass</span><span style="color: #007700">(</span><span style="color: #0000BB">$foo</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$consts&nbsp;&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$reflect</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getReflectionConstants</span><span style="color: #007700">();<br /><br />foreach&nbsp;(</span><span style="color: #0000BB">$consts&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$const</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;print&nbsp;</span><span style="color: #0000BB">$const</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getName</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$consts</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
   </div>

   <div class="example-contents"><p>以上例程的输出类似于：</p></div>
   <div class="example-contents screen">
<div class="cdata"><pre>
FOO
BAR
BAZ
array(3) {
  [0]=&gt;
  object(ReflectionClassConstant)#3 (2) {
    [&quot;name&quot;]=&gt;
    string(3) &quot;FOO&quot;
    [&quot;class&quot;]=&gt;
    string(3) &quot;Foo&quot;
  }
  [1]=&gt;
  object(ReflectionClassConstant)#4 (2) {
    [&quot;name&quot;]=&gt;
    string(3) &quot;BAR&quot;
    [&quot;class&quot;]=&gt;
    string(3) &quot;Foo&quot;
  }
  [2]=&gt;
  object(ReflectionClassConstant)#5 (2) {
    [&quot;name&quot;]=&gt;
    string(3) &quot;BAZ&quot;
    [&quot;class&quot;]=&gt;
    string(3) &quot;Foo&quot;
  }
}
</pre></div>
   </div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-reflectionclass.getreflectionconstants-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="reflectionclass.getreflectionconstant.html" class="methodname" rel="rdfs-seeAlso">ReflectionClass::getReflectionConstant()</a> - Gets a ReflectionClassConstant for a class's constant</span></li>
    <li class="member"><span class="classname"><a href="class.reflectionclassconstant.html" class="classname">ReflectionClassConstant</a></span></li>
   </ul>
  </p>
 </div>


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